package com.gufe.other.interceptor;

import com.gufe.constant.JwtClaimsConstant;
import com.gufe.properties.JwtProperties;
import com.gufe.utils.BaseContext;
import com.gufe.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

/**
 * jwt令牌校验的拦截器
 */

@Component
@Slf4j
public class JwtTokenUserInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;

    @Override
    public boolean preHandle(jakarta.servlet.http.HttpServletRequest request, jakarta.servlet.http.HttpServletResponse response, Object handler) throws Exception {
        /*
         * 校验jwt
         */

        //方法前执行，进行判断
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        //1、从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getUserTokenName());
        if(token == null){
            log.info("jwt校验，token为{}，请求被拦截",token);
            //4、不通过，响应401状态码
            response.setStatus(401);
            return false;
        }

        //2、校验令牌
        try {
            log.info("jwt校验:{}", token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getUserSecretKey(), token);
            Long userId = Long.valueOf(claims.get(JwtClaimsConstant.USER_ID).toString());
            log.info("jwt校验通过，当前登录拥护id：{}", userId);
            //把登录id记录进当前线程空间
            BaseContext.setCurrentId(userId);
            //3、通过，放行
            return true;
        } catch (Exception ex) {
            //4、不通过，响应401状态码
            log.info("jwt校验失败");
            response.setStatus(401);
            return false;
        }
    }
}
